rake: separate "meta" tasks in js namespace
rake: separate "meta" tasks in js namespace

Change-Id: Iad0f61b95939e0a28798622acd56fa3006160e19
Reviewed-on: https://gerrit.instructure.com/95107
Tested-by: Jenkins
Reviewed-by: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>
Product-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
QA-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,instructure/canvas-lms,matematikk-mooc/canvas-lms,instructure/canvas-lms,matematikk-mooc/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,SwinburneOnline/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms